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Sii Sp. z o.o.

Front-end Developer with React (f/m/x)

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B2B
Praca hybrydowa
Senior
Warszawa
Wygasa 2 paź 2026
17 dni temu

W skrócie

Front-end Developer with React role in Warsaw. Responsibilities include UI development with ReactJS, JavaScript, and TypeScript; refactoring components; styling with CSS-in-JS/SCSS; and CI/CD. Requires 5+ years of experience and English fluency. Hybrid work model.

Skrót przygotowany przez AI na podstawie treści ogłoszenia.

Technologies we use

About the project

Your responsibilities

  • Developing and maintaining user interface components using ReactJS and JavaScript
  • Collaborating with backend developers and strategists to implement features
  • Refactoring legacy UI components to align with the new architecture
  • Utilizing CSS-in-JS or SCSS for styling and implementing responsive designs
  • Participating in code reviews and applying SOLID design patterns
  • Contributing to improving CI/CD workflows and frontend build processes

Our requirements

  • Minimum of 5 years of commercial frontend development experience
  • Strong knowledge of ReactJS (including Hooks and Context API) and JavaScript
  • Practical experience with TypeScript with proficiency in modern CSS techniques and tools
  • Familiarity with modern frontend tooling: webpack, npm, GitLab/Jenkins
  • Understanding of testing methodologies and software design principles
  • Fluency in English (spoken and written)
  • Open to hybrid work (3 days per week in the office)

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People
Opublikowana 2026-09-02
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